IP_SNMP-4-NOTRAPIP: SNMP trap source VlanXXXX has no ip address

The following error:

%IP_SNMP-4-NOTRAPIP: SNMP trap source VlanXXXX has no ip address

is caused by the change in the trap source. XXXX is the VID.
You can correct it with the following command:

snmp-server trap-source vlan XXXX

startup-config file open failed (Device or resource busy)

Error message:
"startup-config file open failed (Device or resource busy)"

The write to flash processo might have hang or might be in use by another user.

How to fix:

systat -> check which users are logged in
clear line vty X -> clear all the users from the router
write -> now you can write your config to flash

clear all lines. Any of the sessions is running a process that is writing to flash that might have been hang.